Pilot burner



April 24, 1928.

s. A. ESKILSON ET AL PILOT BURNER Filed Jan.l0. 1927 rllllwwlllllllll ATTORNEY stantly ignited pilot burner shall be asso- Patented Apr. 24, 1928.

' [UNITED STATES V h 1,666,997 PATENT I OFFICE.

SVEN AUGUST ESKILSON' AND KARL AXEL BERNHARD HOLM, 0F STOOKHOLM, SWEDEN, ASSIGNORS T0 AMERICAN 'GASACCUMULATOR COMPANY, OF, ELIZABETH,

NEW JERSEY, A CORPORATION OF N'EW JERSEY.

PILOT-BURNER.

Application filed'J'anuary'l lo, 19 27. Serial'No 160,052." f

In cases where gasis supplied at intervals to a main burner it is necessary that a conciated therewith in order. that when'gas does escape from the main burnerit willbe i'gnited.

It has been found in practice that pilotj burners are liableto. become extinguished,

such extinguishment being due to one cause or another. For instance, onecause of'extinguishment of the p lot flame may be the use of im )ure gas whichresults in the clogging of t e burner; another cause of extingulshment may be due'to the excessive supply of gas to the burner which may result in the-deposition ofsoot to such an extent as to interrupt the flame; or the extinguishment may be due to an inadequatesupply of gas in consequence ofwhich the flame is not sufliciently strong to withstand the gusts of Wind; and it may be als'othat in such case the gathering of insects about the pilot.

burner'might extinguish the same or a water spray: or drops of water whichinight con tact with theflameofthe burner might effect its extinguishment.

The general ob ect of the present inven-" tion is is provide a novel'construction-0t pilot burner of such character that tl e fiame thereof is not liable to become extinguished on account of any of the causes hereinbefOlB referred to, nor on account of any other ha'p pening to .whiohthe flame of suc h' burner may be subjected.

It is also an object of the invention to provide. a pilot burner of novelconstruction embodying means the presence of-whioh pro-- I tects the flame against strong gusts of wind.

Another object of the invention to provide apilot burner of novel construction of a character such that the jfi amei'produce'dj.

thereby is of a magnitude suifici'ent to-prevent its extingu-ishment due to the' falling of water thereon or the gathering'of insects I my I Fig. 6 is aview'in perspective ofone of the pilotburners separate from the, other-parts.- of the construction.

thereabout and thereon.

A Still further object ofthe' invention i tqf associate'with the main burner a-plurality of pilot burners inoperative relation thereto and to each other so that if the; flame of one or said burners should become extinguished ism e eeti fl of the a- Fig. 1 is a Vie-W ln'central vertical sectionvide a pilot burner of novel construction having meanswhereby the atmosphere may be, and is, caused to intermingle with the gasin the burner whereby complete eombu'stion to effect the production ota blue flame is brought about.

To these and other ends the' invention comprehends the construction'of. and ari'angement of parts as hereinafterillustrated 1 in the drawing, described in detail, and par. 7 tleularly pointed out in'the claim H tion may lie-embodied in other forms of construction than that shown and that changes inthe details of the construction may-be made within the scope'of the claims:

without departing from the said invention. I In thedrawing,

ofthe baseor supporting structure for a.

main burner of well known type with which is associated thepilotiburners embodying the invention,,the said main burner, pilot burnersand the pipes for conveying gas to the latter bemgshown inelevation; v

, Fig. 2 is asimilar View taken in a plane at -right angles to that inwhich Fig. :1 is taken; I

,Fig.,3 s a' top View of the burner structureashownin Figs. Land 2;

ever, it willbe understood thatthe 'invenjFig. 4 is a view taken onthe line4 4of Fig. 2, the base portion ofthe structure be ing omitted and the pilot burners being' shownv in. elevation;

Fig. 5 isaview showing themain burner partlyin elevation, a portion'th'e'reof being broken away and 'showniin section'to indicate a gas 0utlet,1andone'of the pilot burnors being shown'in vertical section and a portionof theother. of sa d burners belng shownin elevation; and.

In] the drawings; e have showna j bloek 1 upon which. is the main burne z d tachablyl burner may consist of any suitable ma terialsuc'h as soapstone. This bnrner' is of well known type' terminating atits upper end in twof branch portions 3' and 4 which wa to a cross-wise extendin 'Jassa 'e way 11 which terminates at its opposite ends in enlarged portions 12 the outer end'portions of which are screw threaded for the reception of plugs 13, which in turn are provided with axial screw threaded open ings 14L with which are engaged adjusting screws 15 terminating at their inner ends in cone shaped pointed portions 16. The ends of thepointed portions 16 contact with washers 20 which are seated against the outer ends of porous bodies 21 of any preferred known construction as for instance asbestos fiber the resilience of which is increased by means of the coiled springs 22 imbe'dded therein. By adjustment of the screws 15 the compactness of the fibrous bodies 21 may be varied so as to regulate and control the flow of gas from the cross-wise passageway 11 through the inner portions of the opening 12 and thence through the lower ends of the pipes 25, upon the upper ends of which are mounted the pilot burners of a design These burnersv embodying our invention. consist of boX-likemembers and 31, the former being directly associated with the branch 3 of the. main burner while the latter is associated directly with the branch 4 thereof. The upper ends of these burners are open andshaped as shown, and the sides thereof adjacent the branches 3 and 4 are provided with notches 32. The greater portions of the widths of these notches open upon or against the inner sides of the branches 3 and 4 with which they are associated. In order, however. that opportunity may be afforded for the thorough intermingling of air with the gas within the pilot burners. there is between the inner edge of each notch and the adjoining side of the branch of the main burner with which it may be associated a, slot or passageway 34. The relation of these slots or passageways to the adjacent sides of adjoining branches of the main burner is clearly shown in Figs. 1 and 3 of the drawing. I The burners 30 and 31 are mounted in contact with each other as shown as that if the. flame of one of them should become extinguished .it (the said burner) is maintained in heated condition by reason of heat conducted thereto from the other burner, the burning of which con tinues. As a result of this relationship it is more than likely that the gas escapingfrom the burner of whichthe flame has been extinguished will be reignitedfrom the other burner. But even if itisnot so reignited essee? pilots are protected from drafts or gusts of wind except in cases where such drafts reach the burner by movement in a generally downward direction. If, for instance, there should be acurrent of air moving in a direction at right angles to the plane in which Fig.2 istaken, it will strike the sides'of the burners; if the air should be moving-in a direction at right angles to that last sup posed, oneof the pilot burners will in large part be protected by the presence of one of the. branches 3 or 4;, while the other of said burners will be protected by the side there of which faces toward the direction from which the wind may be coming. From whatever direction the wind may approach the burners, except in a downward direction, the pilot burner flames are well protected so that the liability ofextinguishment thereof as a result of drafts or gusts of air is very greatly reduced.

As already indicated the presence of notches enables the interminghng of {[115 with the gas within the interiors of the burners so that oxygen suflicient for complete combustion 1S supplied whereby blue 'l'lamcs'result; When this is the case the deposition of soot which might close the burner passageway is prevented. Further more the burners are of asize to preventclogging thereof due to soot or toimpuri ties which may be present in the gas. Fur-v thermore the pilot burners being of a char actor to produce a flame of large area or magn tude, such flame is able to resist more eifectively drafts or gusts of airand also is not likely to be extinguished "by the falling of water spray or rain thereon or bythe n presence of insects therearound or thereupon. Having thus described our invention what we claim and desire to secure by Letters Patent is, I

1. A pilot burner comprising a casing to which gas -is supplied, the upper end of which casing is open and one side of which is provided wlth a IIOtGlLW l'II Ch notch opens out to 'a-rd the'body; of the main burner with which the said pilot burner may be associated.

2. A pilotburner which is adapted to be associated with a main burner. which pilot; burner consists of a hollow casing having anopen upper end, one side of said casing having anotch tllQlGlIrWhlCll notch opens toward the mainburner w th"whichthesaid pilot burner is associated, the said -I10tCh.

being partiallyclosed by the said burner and the said burner co-operating. with an edge of the said notch to form a slot for the passage of air into theinterior of the said casing, substantially as described.

' 3. In combination, a main burner consist ing of .two branches and aplurality of pilot burners supported between the said two branches, each of said pilot burners being provided with notches in its side adjoining one of the said branches,- subs'tantially as described.

4. In'combination, a main burner comprising branches angularly related to each other, pilot burners mounted between said branches, each of said burners consisting of a hollow casing havlng an open upper end and also having an opening in a side therev with gas outlet openings upon their inner sides nearft'heir outerends, a plurality of pilot burners supported in adjoining rela-.

tion to each other between the said branches, the said burners consisting of box-like mem bers open at their upper ends, one side of each of which is provided with a notch, each of said pilot burners being supported with one of its sides in contiguous relation to the inner-side of one of said. branches, the said side of each pilot burner being provided with a notch, one edge ofwhich forms a slot with the adjoining side of the associated branch ofthe main burner, substantially as,

described. I Y i 6. In a structure of the character 'described the combination of a main burner and a pilot burner associated therewith, one

side of said pilot burner being located in v contiguous relation to the adjoining side of said main burner and having an opening there n whlch extends beyond one edgeof said side.

In testimony that we claim the foregoing asourfinvention we'have hereunto signed 9 our names this 22nd day of December,

SVEN AUGUST ESKILSON.

KARL AXEL ,BERNHARD HOLM. 

